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Indium zinc sulfide/zinc ferrite composite photocatalyst as well as preparation method and application thereof

An indium zinc sulfide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of easy rapid recombination of electrons and holes, reduce photocatalytic activity, etc., and achieve good application prospects and potential, low cost, and high catalytic degradation activity

Pending Publication Date: 2022-03-01
苏州一泓环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However ZnIn 2 S 4 It also has many shortcomings, such as the photogenerated electrons and holes generated after illumination are easy to recombine rapidly, reducing its photocatalytic activity.

Method used

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  • Indium zinc sulfide/zinc ferrite composite photocatalyst as well as preparation method and application thereof
  • Indium zinc sulfide/zinc ferrite composite photocatalyst as well as preparation method and application thereof
  • Indium zinc sulfide/zinc ferrite composite photocatalyst as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0026] The invention provides a preparation method of indium zinc sulfide / zinc ferrite composite photocatalyst, comprising the following steps:

[0027] a) After mixing iron source, zinc source and polyvinylpyrrolidone in the presence of the first solvent, electrospinning is carried out, and then calcined to obtain ZnFe 2 o 4 Nanofibers;

[0028] b) After mixing the zinc source, indium source and sulfur source in the presence of the second solvent, add the ZnFe obtained in step a) 2 o 4 nanofibers, subjected to solvothermal reaction, so that the resulting ZnIn 2 S 4 Nanosheets supported on ZnFe 2 o 4 On the nanofibers, a composite photocatalyst of indium zinc sulfide / zinc ferrite is obtained.

[0029] In the present invention, the iron source, zinc source and polyvinylpyrrolidone are firstly mixed in the presence of the first solvent, then electrospun, and then calcined to obtain ZnFe 2 o 4 Nanofibers. In the present invention, the iron source is preferably ferric ni...

Embodiment 1

[0062] (1) ZnFe 2 o 4 Preparation of nanofibers: First, 2mmol of Zn(NO 3 ) 2 ·6H 2 O and 4mmol of Fe(NO 3 ) 3 9H 2 O was dissolved in 20 mL of DMF solution; after stirring at room temperature for 2 h, 4 g of polyvinylpyrrolidone (PVP, K90) was added above the solution, and the mixture was continuously magnetically stirred for 12 h to obtain a brown-red homogeneous precursor solution. Then, the precursor solution was transferred into a 5 mL plastic syringe equipped with a steel needle with a diameter of about 0.5 mm for electrospinning (voltage: 20 kV, injection rate: 0.2 mm / min). Finally, the obtained nanofibers were calcined in air at 600 °C for 2 hours at a heating rate of 1 °C / min to obtain ZnFe 2 o 4 Nanofibers.

[0063] Morphological characterization see figure 1 shown; figure 1 It is the ZnFe prepared in this embodiment 2 o 4 The scanning electron micrograph (SEM) of nanofiber, wherein (a) and (b) represent the ZnFe that the present embodiment prepares 2 o 4...

Embodiment 2

[0071] The preparation method provided in Example 1 is adopted, with the difference that: a ZIS / ZFO composite material with 10 wt% ZFO is obtained in this example.

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Abstract

The invention provides an indium zinc sulfide / zinc ferrite composite photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: a) mixing an iron source, a zinc source and polyvinylpyrrolidone in the presence of a first solvent, performing electrostatic spinning, and calcining to obtain ZnFe2O4 nanofibers; and b) mixing a zinc source, an indium source and a sulfur source in the presence of a second solvent, adding the ZnFe2O4 nanofiber obtained in the step a), and carrying out solvothermal reaction, so that the obtained ZnIn2S4 nanosheet is loaded on the ZnFe2O4 nanofiber to obtain the indium zinc sulfide / zinc ferrite composite photocatalyst. Compared with the prior art, the preparation method provided by the invention has the advantages that a two-dimensional ZnIn2S4 nanosheet photocatalyst is loaded on one-dimensional zinc ferrite (ZnFe2O4) nanofibers through a low-temperature solvothermal method, so that the ZnIn2S4 / ZnFe2O4 nano composite material is obtained, and the composite material can be used for carrying out photocatalytic degradation on waste gas so as to effectively treat the waste gas.

Description

technical field [0001] The invention relates to the technical field of inorganic functional materials, and more specifically relates to an indium zinc sulfide / zinc ferrite composite photocatalyst and its preparation method and application. Background technique [0002] With the rapid development of social industrialization and economy, a large amount of industrial waste gas has caused serious pollution, which has brought great harm to humans, animals and plants. At the same time, the exhaust gas in the atmosphere also causes serious environmental pollution problems such as acid rain, acid fog and photochemical smog. Therefore, finding cheap, efficient, and energy-saving methods to degrade and treat waste gas has become a hot issue for scientific researchers. [0003] At present, semiconductor photocatalysis technology has the advantages of non-toxicity, high degradation efficiency, strong redox ability, etc., and is considered to be one of the economical and effective metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J35/06B01J35/08B01J35/02B01D53/86B01D53/56
CPCB01J27/043B01D53/8628B01J35/39B01J35/40B01J35/58B01J35/51
Inventor 孙俐俐
Owner 苏州一泓环保科技有限公司
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